turkey is a nato member here, so the consequences of this escalating are very great in deed. >> nick, thank you. >>> as the fighting rages on, an ex-patriot syrian doctor is back in safetism jim clancy that is details. >> we're just a few minutes. we just saw the turkish -- the border patrol passing by. >> this is mohamed, a syrian expatriot who has heeded the call to return home and help those in his country who are in desperate need. he's a dentist by profession. he left syria a decade ago, and today, he is determined to get medical supplies and know-how where they're needed. he's not radical, he says. he's not extraordinary. he left his family at home in saudi arabia and plowed half of his life savings into these monthly cross-border missions to coordinate medical relief among the rebels. >> this is one of the supplies that the civil yians are using. they help stop the wound. >> we're headed for a secret hospital still under construction, hugging the mountains and a turkish border. the free syrian army hopes it would be protected from air strikes. we can't show you the exterior. mo